CN101291775B - Amorphous iron-nickel-based brazing foil and brazing method - Google Patents

Amorphous iron-nickel-based brazing foil and brazing method Download PDF

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Publication number
CN101291775B
CN101291775B CN2006800393907A CN200680039390A CN101291775B CN 101291775 B CN101291775 B CN 101291775B CN 2006800393907 A CN2006800393907 A CN 2006800393907A CN 200680039390 A CN200680039390 A CN 200680039390A CN 101291775 B CN101291775 B CN 101291775B
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China
Prior art keywords
soldering
foil
amorphous state
ductility
metal parts
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CN2006800393907A
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Chinese (zh)
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CN101291775A (en
Inventor
T·哈特曼
D·努特泽尔
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Vacuumschmelze GmbH and Co KG
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Vacuumschmelze GmbH and Co KG
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • B23K35/3053—Fe as the principal constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0222—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in soldering, brazing
    • B23K35/0233—Sheets, foils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • B23K35/3053—Fe as the principal constituent
    • B23K35/3066—Fe as the principal constituent with Ni as next major constituent
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/11—Making amorphous alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt
    • C22C19/03—Alloys based on nickel or cobalt based on nickel
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C45/00—Amorphous alloys
    • C22C45/02—Amorphous alloys with iron as the major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C45/00—Amorphous alloys
    • C22C45/04—Amorphous alloys with nickel or cobalt as the major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/089—Coatings, claddings or bonding layers made from metals or metal alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2201/00—Treatment for obtaining particular effects
    • C21D2201/03—Amorphous or microcrystalline structure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12951—Fe-base component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12951—Fe-base component
    • Y10T428/12958—Next to Fe-base component

Abstract

The present invention relates to an iron-nickel-based brazing foil. An amorphous ductile brazing foil with a composition is produced comprising FeaNibCrcSidBeMOfPg, wherein 25 <= a <= 50 atomic %; 30 <= b <=45 atomic %; 5 <= c <= 15 atomic %; 4 <= d <= 15 atomic %; 4 <= e <= 15 atomic %; 0 <= f <= 5 atomic %; 0 <= g <= 6 atomic %; and incidental impurities, wherein 10 = d+e+g = 28 atomic % with a+b+c+d+e+f+g =100. Outstanding brazed joints can be produced with these brazing foils.

Description

Iron and nickel-based brazing paper tinsel and method for welding
Technical field
The present invention relates to the method for a kind of iron and nickel-based brazing paper tinsel and the two or more metal parts of soldering.
Background technology
The iron-based brazing alloy for example has been disclosed among the US4402742.The iron-based brazing alloy has because of the cost of raw material is lower than nickel-based brazing alloy advantages of being cheap more.In addition, the easier combination of ferrous alloy can be more accurately be complementary with the composition of parts to be welded because its weld seam is formed.
Yet known iron-based brazing alloy is a crystal, and is made into powder or pastel.Powder is generally handled by melt is atomized and is made.Pastel is then by making metal dust and organic binder bond and solvent.In fact its disadvantage is, this organic principle decomposes when being heated to brazing temperature, and this can influence the flowability and the wellability of fusion brazing alloy.
Have a risk in addition, promptly joint possibly can't be filled by this brazing alloy fully, and this will cause no longer can guaranteeing reliably the mechanical stability of parts to be welded.When brazed metal heat exchanger or similar products, this binding deficient is extremely dangerous for its anti-leakage, and might make this heat exchanger to use.
These problems can be avoided by the brazing alloy that uses homogeneous ductility paper tinsel form.But still can not make the iron and the nickel-based brazing alloy of ductility paper tinsel form up to now.
Summary of the invention
Therefore, based on the problems referred to above, the invention provides a kind of iron-based brazing alloy of ductility paper tinsel form, it has good flowability and wellability, thereby can guarantee flawless soldered fitting (brazing joint), the present invention has also formulated a kind of method for welding that uses this class ductility foil for soldering.In addition, this brazing alloy should be made with the paper tinsel of the rapid solidification of very wide thickness and width range, thereby makes it can satisfy multi-purpose Technology Need.
According to the present invention, the problems referred to above solve by a kind of amorphous state ductility foil for soldering, and it is formed mainly by Fe aNi bCr cSi dB eMo fP gForm with any impurity, wherein 25≤a≤50at%; 25≤b≤50at%; 5＜c≤15at%; 4≤d≤15at%; 4≤e≤15at%; 0≤f≤5at%; 0≤g≤6at%; Wherein 10≤d+e+g≤28at%, and a+b+c+d+e+f+g=100.
With nickel-based brazing alloy phase ratio, iron content is higher and nickel content is low makes the cost of raw material decrease.Thereby according to foil for soldering of the present invention not only economic but also suitable industrial use.The Ni content of this brazing alloy is preferably 30≤b≤45at%.
Chromium content provides good corrosion resistance, so this soldered fitting can be worked in Korrosionsmedium.The ductility of nickel-based brazing alloy can be with the increase of chromium content variation.But in according to foil for soldering of the present invention, can add the chromium content of 5-15at% and not obvious reduction ductility.
Composition according to brazing alloy of the present invention makes this alloy can be made into the amorphous foil of ductility after further selecting.This paper tinsel is preferably made by fast solidification technology.
Element boron, silicon and phosphorus are metalloid and aerogenesis element (gas-forming element).The higher meeting of the content of these elements causes fusion temperature or liquidus temperature to reduce.On the one hand, if the content of aerogenesis element is low excessively, this paper tinsel can solidify and form crystal and extremely crisp.And on the other hand, if the too high levels of aerogenesis element, this paper tinsel is a fragility under bar situation as thin as a wafer, no longer can be used for production technology.
Further select the content of metalloid, make the weld seam of making by this foil for soldering have suitable mechanical performance.B content height can cause separating out the B hard mutually in this weld seam and base material, and this can influence the mechanical performance of soldering compound.In this technology, boron and chromium react, and this causes corrosion resistance obviously to reduce equally.Higher causing of Si content forms undesirable Si hard phase in weld seam, this can reduce the intensity of weld seam.
Therefore according in the composition that foil for soldering of the present invention had, the content of aerogenesis element amounts to the 10-28at% that accounts for this alloy.Brazing alloy with this composition can be made into the amorphous foil of ductility by rapid solidification method.
For these reasons, B content is 4-15at%, preferred 4-12at%, and Si content is 4-15at%, preferred 5-13at%.
Brazing alloy according to the present invention has and is lower than 1200 ℃ liquidus temperature.This is desirable, because many industrial soldering processes particularly are limited to about 1200 ℃ in conjunction with the maximum temperature of stainless steel-based bottom material.By convention, this brazing temperature should be low as far as possible, and this is because base material tends to generate disadvantageous coarse-grain since 1000 ℃.Generate and thisly do not wish that the coarse-grain that produces can reduce the mechanical strength of this base material, this is very dangerous in the many commercial Application such as heat exchanger.In brazing alloy according to the present invention, this problem has obviously reduced.
Have been found that nickel content is that 25-50at% and iron content are that the fusion temperature of the alloy of 25-50at% is lower than 1200 ℃.Because this nickel content, the content of aerogenesis element can be minimized.Owing to can reduce metalloid content, thereby avoid forming the hard shortcoming mutually of B and Si.
Therefore, be fit to the highest brazing temperature according to brazing alloy of the present invention and be limited to 1200 ℃ industrial use.This alloy can provide reliable soldered fitting.
Preferably make the amorphous state foil for soldering of homogeneous, ductility according to brazing alloy of the present invention, it is general 50%, preferably be higher than 80% is amorphous state.
Foil for soldering according to the present invention is characterised in that excellent flowability and wetability, can finish filler weld (fillet weld) and zero defect joint reliably.This has guaranteed the mechanical stability of this solder joint, and has increased the possible purposes quantity according to foil for soldering of the present invention.
Under identical metalloid content, ductility foil for soldering according to the present invention can be made quite thick and quite wide band.Therefore brazing alloy according to the present invention is very suitable for being cast as thickness greater than 30 μ m, preferred 40 μ m≤D≤80 μ m, and width is greater than 40mm, preferred 20mm≤B≤300mm, and adopts alloy of the prior art only can realize limited scope.
Under identical metalloid content, the foil for soldering that nickel content according to the present invention is higher than 25at% has better yield point (ductility limit) than the brazing alloy that nickel content is lower than 20at%.Therefore it can make thicker foil for soldering, and such foil for soldering satisfies multi-purpose all specification requirements easily.Employing can be made the band that the required thickness of a large amount of industrial uses is at least 30 μ m according to brazing alloy of the present invention.
The present invention further provides a kind of heat exchanger.This heat exchanger has at least one weld seam of being made by following foil for soldering, and the composition of this foil for soldering is mainly by Fe aNi bCr cSi dB eMo fP gForm with any impurity, wherein 25≤a≤50at%; 25≤b≤50at%; 5＜c≤15at%; 4≤d≤15at%; 4≤e≤15at%; 0≤f≤5at%; 0≤g≤6at%; Wherein 10≤d+e+g≤28at%, and a+b+c+d+e+f+g=100.This solder joint is made by amorphous state ductility foil for soldering.In a further embodiment, Ni content is 30≤b≤45at%.Perhaps, this heat exchanger can have the weld seam of being made by the described amorphous state ductility of aforementioned arbitrary embodiment foil for soldering.
Above-mentioned difference by amorphous state ductility foil for soldering weld seam of making and the weld seam of being made by crystal powder is B and Si hard size mutually.
The present invention further provides and a kind ofly connect the method for two or more metal parts by adhesive force, this method comprises the steps.Between two or more metal parts to be connected, introduce the described amorphous state ductility of aforementioned arbitrary embodiment foil for soldering.Described metal parts to be connected has the fusion temperature that is higher than this foil for soldering, and can be by for example stainless steel, Ni or Co alloy composition.Compound to be brazed is heated above the temperature of the liquidus temperature of this foil for soldering, cooling subsequently, thus between described metal parts to be connected, form soldered fitting.
Described metal parts to be connected is preferably heat exchanger component, waste gas circulation cooler or fuel cell.The reliable soldered fitting of these product needed, the complete leakproof of this soldered fitting, corrosion-resistant under the rising operating temperature, mechanically stable thereby reliable.Foil for soldering according to the present invention makes it possible to obtain such joint.
Can be used for making one or more weld seams according to foil for soldering of the present invention at article.These article through soldering can be as for example heat exchanger, waste gas circulation cooler or fuel cell.
Utilize fast solidification technology will foil for soldering according to the present invention make amorphous state, homogeneous, the ductility foil for soldering., metal bath is ejected on high speed casting wheel or the casting tube by casting nozzle for this reason, and to be higher than 10 5℃/cooling of the speed of s.Subsequently, general under the temperature between 100 ℃-300 ℃, the band of casting is taken off from this casting wheel, directly be wound into so-called strip coil or be wound on the spool.
Amorphous state foil for soldering according to the present invention is used for connecting two or more parts by adhesive force, comprises the steps:
-melt is provided, it is by Fe aNi bCr cSi dB eMo fP gForm with any impurity, wherein 25≤a≤50at%; 25≤b≤50at%; 5＜c≤15at%; 4≤d≤15at%; 4≤e≤15at%; 0≤f≤5at%; 0≤g≤6at%; Wherein 10≤d+e+g≤28at%, and a+b+c+d+e+f+g=100;
-by to be higher than about 10 5℃/speed above-mentioned melt of rapid solidification on mobile cooling surface of s, make amorphous state brazing alloy paper tinsel;
-by between metal parts to be connected, applying this brazing alloy paper tinsel, form the soldering compound;
-this soldering compound is heated above the temperature of the liquidus temperature of this brazing alloy paper tinsel;
This soldering compound of-cooling, thus between described metal parts to be connected, form joint.
In a further embodiment, melt is provided, it is by Fe aNi bCr cSi dB eMo fP gForm with any impurity, wherein 25≤a≤50at%; 30≤b≤45at%; 5＜c≤15at%; 4≤d≤15at%; 4≤e≤15at%; 0≤f≤5at%; 0≤g≤6at%; Wherein 10≤d+e+g≤28at%, and a+b+c+d+e+f+g=100.
The above-mentioned joint that forms by adhesive force relates to utilization according to the soldering processes that iron of the present invention and nickel-based brazing alloy carry out, and can obtain not have the perfect soldered fitting of any joint defect whereby.
Liquidus temperature according to brazing alloy of the present invention is lower than 1200 ℃.Method for welding according to the present invention is particularly suitable for connecting the metal parts of being made by stainless steel and/or nickel and/or cobalt alloy by adhesive force.These parts are generally used for making heat exchanger or similar products (for example waste gas circulation cooler).
Under brazing temperature, the wetting described metal parts to be connected of this fusion foil for soldering because it has according to composition of the present invention thereby this weld seam of complete filling, has therefore been avoided joint defect.
The specific embodiment
Below, describe the present invention in detail with reference to embodiment and Comparative Examples.
Table 1 has been listed the solidus and the liquidus temperature of the Fe-Ni foil for soldering with different Ni and metalloid content.
Table 1
Figure GSB00000504234000051
The the 1st to No. 5 foil for soldering is not a part of the present invention, the 6th to No. 14 then be according to foil for soldering of the present invention.
The processing temperature of these foil for soldering and brazing temperature are usually than the high 10-50 of liquidus temperature ℃.As shown in table 1, the Fe-Ni foil for soldering that Ni content is lower than 25at% (in the table 1 the 1st to No. 5) tends to have the liquidus temperature apparently higher than 1200 ℃.This processing temperature that makes Ni content be lower than the Fe-Ni foil for soldering of 25at% is higher than 1200 ℃.Such processing temperature is can not be received, because this temperature can cause forming coarse-grain, damages the base material of parts to be connected.
Under identical metalloid content, i.e. Si and B content, have 25 or the Fe/Ni brazing alloy of the higher Ni content of 40at% (in the table 1 the 6th to No. 14) have the liquidus temperature that is lower than 1200 ℃ of admissible maximum temperatures in the industrial technology.Therefore processing temperature is lower than 1200 ℃, and this is an acceptable.And these alloys can be made into the amorphous state ductility paper tinsel of tape thickness greater than 30 μ m, thereby satisfy industrial application requirements.
The 1st embodiment
Employing consists of the ductility amorphous state foil for soldering of Fe32-Ni40-Cr10-Si9-B9 and makes weld seam.The soldering condition is for to reach 30 minutes at 1190 ℃.This alloy flows through and wetting this base material, forms the filler weld of filling ideally.This weld seam does not have the defective of any lack of fusion.
The 2nd embodiment
Employing consists of the ductility amorphous state foil for soldering of Fe62-Ni10-Cr10-Si5-B11 and makes weld seam.The soldering condition is for to reach 30 minutes at 1240 ℃.The flowability of this brazing alloy and wellability extreme difference, so joint not is by complete filling.The fusion situation extreme difference of joint.Can't guarantee reliable joint.

Claims (34)

1. amorphous state ductility foil for soldering, it is formed mainly by Fe aNi bCr cSi dB eMo fP gForm with any impurity, wherein 25≤a≤50at%; 25≤b≤50at%; 5＜c≤15at%; 4≤d≤15at%; 4≤e≤15at%; 0≤f≤5at%; 0≤g≤6at%; Wherein 10≤d+e+g≤28at%, and a+b+c+d+e+f+g=100.
2. amorphous state ductility foil for soldering, it is formed mainly by Fe aNi bCr cSi dB eMo fP gForm with any impurity, wherein 25≤a≤50at%; 30≤b≤45at%; 5＜c≤15at%; 4≤d≤15at%; 4≤e≤15at%; 0≤f≤5at%; 0≤g≤6at%; Wherein 12≤d+e+g≤24at%, and a+b+c+d+e+f+g=100.
3. amorphous state ductility foil for soldering according to claim 1 and 2 is characterized in that Si content is 5≤d≤13at%.
4. amorphous state ductility foil for soldering according to claim 1 and 2 is characterized in that B content is 4≤e≤12at%.
5. amorphous state ductility foil for soldering according to claim 1 and 2 is characterized in that liquidus temperature is lower than 1200 ℃.
6. amorphous state ductility foil for soldering according to claim 3 is characterized in that liquidus temperature is lower than 1200 ℃.
7. amorphous state ductility foil for soldering according to claim 4 is characterized in that liquidus temperature is lower than 1200 ℃.
8. amorphous state ductility foil for soldering according to claim 1 and 2 is characterized in that this foil for soldering at least 80% is amorphous state.
9. amorphous state ductility foil for soldering according to claim 3 is characterized in that this foil for soldering at least 80% is amorphous state.
10. amorphous state ductility foil for soldering according to claim 4 is characterized in that this foil for soldering at least 80% is amorphous state.
11. amorphous state ductility foil for soldering according to claim 5 is characterized in that this foil for soldering at least 80% is amorphous state.
12. amorphous state ductility foil for soldering according to claim 1 and 2 is characterized in that its thickness D is greater than 30 μ m.
13. amorphous state ductility foil for soldering according to claim 3 is characterized in that its thickness D is greater than 30 μ m.
14. amorphous state ductility foil for soldering according to claim 4 is characterized in that its thickness D is greater than 30 μ m.
15. amorphous state ductility foil for soldering according to claim 5 is characterized in that its thickness D is greater than 30 μ m.
16. amorphous state ductility foil for soldering according to claim 8 is characterized in that its thickness D is greater than 30 μ m.
17. amorphous state ductility foil for soldering according to claim 12 is characterized in that its thickness is 40 μ m≤D≤80 μ m.
18. amorphous state ductility foil for soldering according to claim 1 and 2 is characterized in that its width is 20mm≤B≤300mm.
19. amorphous state ductility foil for soldering according to claim 3 is characterized in that its width is 20mm≤B≤300mm.
20. amorphous state ductility foil for soldering according to claim 4 is characterized in that its width is 20mm≤B≤300mm.
21. amorphous state ductility foil for soldering according to claim 5 is characterized in that its width is 20mm≤B≤300mm.
22. amorphous state ductility foil for soldering according to claim 8 is characterized in that its width is 20mm≤B≤300mm.
23. amorphous state ductility foil for soldering according to claim 12 is characterized in that its width is 20mm≤B≤300mm.
24. amorphous state ductility foil for soldering according to claim 17 is characterized in that its width is 20mm≤B≤300mm.
25. amorphous state ductility foil for soldering according to claim 18 is characterized in that its width B 〉=40mm.
26. heat exchanger, this heat exchanger have at least one by the weld seam that following amorphous state ductility foil for soldering is made, the composition of this foil for soldering is mainly by Fe aNi bCr cSi dB eMo fP gForm with any impurity, wherein 25≤a≤50at%; 25≤b≤50at%; 5＜c≤15at%; 4≤d≤15at%; 4≤e≤15at%; 0≤f≤5at%; 0≤g≤6at%; Wherein 10≤d+e+g≤28at%, and a+b+c+d+e+f+g=100.
27. have the heat exchanger of at least one weld seam of making by each described foil for soldering of claim 1-25, it is characterized in that this weld seam＞30 μ m.
28. connect the method for two or more metal parts by adhesive force, this method comprises the steps:
-between two or more metal parts to be connected, introduce each described amorphous state ductility foil for soldering among the claim 1-25, the fusion temperature of wherein said metal parts to be connected is higher than this foil for soldering;
-this soldering compound is heated above the temperature of the liquidus temperature of this foil for soldering;
This soldering compound of-cooling, thus between described metal parts to be connected, form soldered fitting.
29. connect the method for two or more metal parts according to claim 28 is described by adhesive force, it is characterized in that described metal parts to be connected is the parts of heat exchanger, waste gas circulation cooler or fuel cell.
30. connect the method for two or more metal parts by adhesive force, comprise the steps:
-Fe is provided aNi bCr cSi dB eMo fP gWith the melt of any impurity, 25≤a≤50at% wherein; 25≤b≤50at%; 5＜c≤15at%; 4≤d≤15at%; 4≤e≤15at%; 0≤f≤5at%; 0≤g≤6at%; Wherein 10≤d+e+g≤28at%, and a+b+c+d+e+f+g=100;
-by to be higher than about 10 5℃/speed above-mentioned melt of rapid solidification on mobile cooling surface of s, make amorphous state brazing alloy paper tinsel;
-by between metal parts to be connected, applying this brazing alloy paper tinsel, form the soldering compound;
-this soldering compound is heated above the temperature of the liquidus temperature of this brazing alloy paper tinsel;
This soldering compound of-cooling, thus between described metal parts to be connected, form soldered fitting.
31. connect the method for two or more metal parts by adhesive force, comprise the steps:
-Fe is provided aNi bCr cSi dB eMo fP gWith the melt of any impurity, 25≤a≤50at% wherein; 30≤b≤45at%; 5＜c≤15at%; 4≤d≤15at%; 4≤e≤15at%; 0≤f≤5at%; 0≤g≤6at%; Wherein 10≤d+e+g≤28at%, and a+b+c+d+e+f+g=100;
-by to be higher than about 10 5℃/speed above-mentioned melt of rapid solidification on mobile cooling surface of s, make amorphous state brazing alloy paper tinsel;
-by between described metal parts to be connected, applying this brazing alloy paper tinsel, form the soldering compound;
-this soldering compound is heated above the temperature of the liquidus temperature of this brazing alloy paper tinsel;
This soldering compound of-cooling, thus between described metal parts to be connected, form joint.
32. each described amorphous state ductility foil for soldering is used for the purposes of two or more parts of brazed metal heat exchanger, waste gas circulation cooler or fuel cell among the claim 1-25.
33. the article through soldering is characterized in that, at least one weld seam is made by each described amorphous state ductility foil for soldering among the claim 1-25.
34. according to the described article of claim 33, as heat exchanger, waste gas circulation cooler or fuel cell through soldering.
CN2006800393907A 2005-08-22 2006-07-18 Amorphous iron-nickel-based brazing foil and brazing method Expired - Fee Related CN101291775B (en)

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